I have 12 adult girls and 16 girls that are 9 weeks old. The babies are in the yard but separated from the older girls but they can all see each other. Today when I came home from work one of the babies was out of her area (no idea how) and with the big girls. The big girls didn't seem to pay her any mind at all. But I have read where they need to be much much older to be put together. What is some of your thoughts on this. By the way their yard is very very big and enclosed on the top to keep hawks etc out.